CDC Director Walensky Has Covid Rebound After Paxlovid Treatment

US Centers for Disease Control and Prevention Director Rochelle Walensky is experiencing a rebound of Covid-19 symptoms after taking Pfizer Inc.’s antiviral Paxlovid.

Walensky contracted a mild case of Covid earlier this month and tested negative after taking Pfizer’s treatment. On Sunday, she began developing mild symptoms and has again tested positive, the CDC said Monday in a statement. The infectious disease expert is isolating at home and will continue to work virtually.

Many patients, including President Joe Biden and Anthony Fauci, have faced a return of Covid symptoms after taking a full, five-day course of Pfizer’s drug. ...